Concentrator for pulverulent materials.



EN. 821,819. PATBNTED MAYQQ, 190e.

` R. G. NBUMAN' UONGENTRATOR FOR PULVBRULBNT MATERIALS..

APPLICATION FILED APR.2, 1902.

I 73 '6 7 7 W ll (ll l y @y f y ENCE,

RICHARD GOTTHILF NEUMANN, OF

WANDSBEK. 'NEAR HAMBURG, GrFiR-- MANY, ASSIGNUR. TO THE FIRM OFKAKAO-COMPAGNIE THEODOR REICHARDT GESELLSCHAFT MlT BESCHRNKTER HAFTUNG,AT A WANDSBEK. NEAR HAMBURG, GERMANY.

CONCENTRATOR eenA Puri/EHU LENT mATEmALs.

Specification of Letters Patent.

iatenteoi May 29, 1906.

Application filed April 2, 1902. Serial No; 101.086.

T0 all whom, t may concern,.-

Be it known that l, RICHARD Go'rTIIlLF NEUMANN, a subject of the GermanEmperor, and a resident of Wandsbek, near Hamburg, in the German Empire,have invented certain new and useful Improvements in Concentrators forPulverulent Materials, of which the following is a specification.

The present invention relates to concentrators for pulverulent materialsof that class in which the pulverulent or finely-divided material iscarried by a moving body of air or its equivalent through azigzag-shaped or undulatedpipe-conduit or incasement provided withdischarge-channels, and more particularly refers to means whereby theconcentration or separation of the constituent particles of the materialis controlled, the moving air freed from its admixtures, dust, tc., andsupplied back as pressureless air to the centrifugal ventilator, or anyother suitable lmeans forforcing the air through the said concentrator,so that the same bulk of air may be used over and over again.

Vtith this end in view my invention consists in certain novel featuresof construction and combinations of' parts, as will be hereinafter fullydescribed, with reference to the aecompanying sheet of drawings, inwhich- Figure 1 is a side elevation, partly in section, of .aconcentrator constructed in accordance with and embodying my invention.

Fig. 2 is a plan or top view of my improved concentrator, and Fig. 3 isa horizontal longitudinal section of the undulatedconcentrator-incasement of the casing for the centrifugal ventilator andof the collecting vessels for the concentrated niaterial.

Similar letters refer to similar parts 'throughout the several views.

l 0r shut up by swing-doors or turn-aps d, l hinged inside theserpentine casing b and operated by outside handles e. The said handles,and consequently the flaps d, maybe secured in the proper position bymeans of serrated segments p, fastened on the top plate of theserpentine easing, as this is evident from the drawings without furtherdetailed explanation. When the concentrator is in operation, theturn-flaps are so placed that their vertical free edges are oppositelydirected to the direction of motion of the material forced through theconeentratorcasing b. This position of the turn-flaps is shown in Fig.3.

is forced by the action of the centrifugal ventilator a, to whichrotation may be imparted by a pulley o through the serpentine casing b,whereby the material is thrown alternately against the curved verticalside walls of the casing or conduit l). The constituent particles of thematerial are according to their relative gravity and size driven by theair-blast for a more or less greater distance throu h the serpentineeasing b, and as the turniaps d are directed opposite to the directionof motion or path of the said particles the latter are dei'lected ordirected by the said turn-iiaps into the corresponding lateraldischarge-channels c. The heavier or larger particles are thusdischarged into the channels c nearest lor nearer to the ventilator,while the lighter and iiner or-lightest and finest particles `arecarried and driven into the more remote and remotest channels c. Theair-blast carrying the dust enters at the exit of the serpentineIconduit b into a suitable, preferably cylindrical, collecting vessel h.The diseliarge-channels c lead int similar collecting vessels q. Withinthe vessels g and' 7L the posited .and collected at the lower ends oflthese vessels into bags t or the like, while the oto., of therespective material escapes by vertical pipes g and h andconnecting-pipes le, respectively, into a main pipe Z, through which thesaid air passes into a similar but somewhat larger collecting vessel m.In this latter vessel the air is freed from the last particles lof dust,&c.,' and relieved from any The material fed through a supply-pipe fyparticles, dust, etc., forced therein are deair more or less freed fromthe particles, dustyv IOO pressure. The thus cleaned or purified andpressureless air is led back to-the ventilator or ventilator-casingrespectively, throu h a pipe-conduit n, so that the same bulk o airrnayy be used over and over again.

i n the example shown the feed-pipe f discharges into the air-conduit nin front of the ventilator, so that the supplied material is suckedtogether with the air coming from the vessel m.

Although'it is preferred to employ for mau terials which are subject tospoilinr-such as Hour, grits, inely-ground cacao,andthe likeconcentrator-casings having an undulated or serpentine form, in some cases,however, when materials less liable to spoiling-such ascoloring-matters, brick-dust, &c.-are to be concentrated,concentrator-casings having a Zigzag-shaped form may be used withequally good results.

Having fully described my invention, what l claim, and. desire to secureby Letters Patent, 1s-' 1. In a. concentrator, the combination with anair-blast, of a horizontal serpentine-conduit connected at one end tothe delivery end of said blast and 'at the other end to the suction endof the blast to form a closed air-blast circuit, discharge-passages fromthe conduit ing discharge-ports in its vertical walls, chan-` nelsleading from said ports in the direction of the flow of air in theconduit, doors mounted .at said ports adapted to extend into the path ofthe current of air, collecting vesselsv 1n communicatlon W1tl1 saidchannels, and

air-passages leading from the collectors to the air-blast,lsubstantially as and tor the purpose specified.

3. In a concentrator, the combination with` an air-blast, of aserpentine conduit having verticalsides, connected atone end to thedelivery end of the air-blast and' a pipe con- -nection between theother end of the conduit and the suction 'end of the airblast, thereby'forming a closed circuit, a dust-collector connected tof/the saidpipeand closed rece tacles connected to' the conduit to receive t eseparated material, substantially as described.

4. In aconcent'rator, the combination withl an air-blast, of a closedhorizontallyearn ranged serpentine conduit rectangular in lcross-section, a plurality of lateral discharge channels leading fromthe ports in the vortical Walls of the conduit and mounts-din thcdirection of the flow of air, doors hinged at the mouths of saidchannels, means for adjusting said doors into. the path of theaircurrent, a collecting vessel communicating charge-channels leadingfromI ports formed,

in the vertical side Walls of said conduit, said channels being mountedin the direction of the flow of air in the conduit, doors mounted' atthe receiving 'end of said' channels, handles for positioning andlocking said doorsint' the path oi the current of airin the conduit,

'a collecting vessel for each dischargeechannel, an-air-passage leadingfrom 'the'top of each collectin vessel, a main passage vcommunicatingwith the aforesaid air-passage,v

and an air-collector interposed between said main passage and feed-pipe,substantially as described. V

6. in a concentrator, the combination with an air-blast, of a horizontalserpentine orjsinusoidal conduit having ports in the sides thereof andconnected at one end' to 'the vairblast, a pipe connection 'betweenpthe'other end of said conduit and the suction side of said air-blast,aplurality of lateraldischargechannels leading from the ports, and meansto :individually control the opening of said" ports, whereby theparticles foliowing first one side then deflected to the"'otl`1er side'of `said conduit will be separated in the order of their gravities', theheavier and, larger par-"' ticles passing into the discharge-channelsnearer the'air-blast.

7 ln a concentrator, the'coinbination an air-blast, oi aserpentinelconduit h'avin'g'a continuous bottom and serpentine-orzigzag'E side walls having openings therein, adj'nstable doors tocontrol said openings, and' means connected to the conduit at the open/ings to receive the separated material, where` by the heavier particleswill pass through the regv openingsnearest the air-blast, being movedfirst against oneI wall and then as described. l v

RICHARD GOTllllliF llllllllllllN.` i Witnesses:

MAX LEMCKE, E. H. L. MUMMENHOFF.

against thev other .in-a substantially horizontalj directron

